Nextcloud on mobile phone syncs only with mobile data and not on LAN network

Hello to everyone.
I am using nextcloud on a Synology NAS.
On my mobile phone works great and syncs everything when ever I am on LAN or on mobile data.
On my wife’s mobile phone it only syncs when ever it is on mobile data, when ever she is connected to the LAN network she gets an error.
Any ideas on how to solve this strange behavior?

Thank you.

Hello @vagelism22678 ,

You started a topic in support category.
Unfortunately you ignored the template and a lot of information to help you is missing.

Please add all necessary information like Nextcloud version, webserver type and version, os version, related log file content.

Without additional information the community members cannot help you.

Which mobile phones are you using and which OS versions they are using?

Which one?

1 Like

The error is , can’t reach server. The mobile is mi 10.
Thank you.

Surely your wife’s mobile phone is on WLAN instead. Is she able to open your Nextcloud in the browser on her mobile phone?

Yes. She can access the web interface of nextcloud.
When she restarts the WiFi on her mobile, then one picture is uploading and the it starts to generate the same error for the rest…

Problem solved.
The problem was dhcp ipv6 DNS . So with an update to the google IPV6 DNS server on my router, the problem solved.